JP5279664B2 - Cylinder barrel surface treatment equipment - Google Patents

Description

  The present invention relates to a cylinder barrel surface treatment technique in which a treatment liquid is brought into contact with an inner surface of a cylinder barrel provided in a cylinder block to treat the inner surface.

Since the inner surface of the cylinder barrel of the engine is exposed to high heat due to friction caused by piston rings and combustion of fuel, surface strength is required. Surface treatment is effective for increasing the strength of the surface. When performing a plating process which is one of the surface treatments, it is desired to remove surface stains and the like before the plating process. Such a process of removing dirt and the like before the surface treatment is called pretreatment.
An example of the pretreatment of the plating process will be described with reference to the following diagram.

  As shown in FIG. 11, in the pretreatment, an etching treatment, an acid activation treatment, a first zinc substitution treatment, a dissolution activation treatment, and a second zinc substitution treatment are performed. The etching process alone is composed of a plurality of processes such as chemical treatment with a treatment liquid, primary water washing for washing, secondary water washing and an idler for preventing drying. Among these processes, a specific example of a chemical treatment process has been proposed (see, for example, Patent Document 1 (FIG. 3B)).

The technique of this patent document 1 is demonstrated below based on drawing.
As shown in FIG. 12, the cylinder block 101 is placed on a pallet 104 provided with a lower opening closing member 103 to close the lower opening of the cylinder block 101. Then, the palette 104 is placed on the pan 105. The cover member 107 provided with the nozzle 106 is moved as indicated by the arrow (1), the upper opening of the cylinder block 101 is closed, and the flexible seal ring 102 is sealed.

The processing liquid is supplied from the processing liquid supply path 108 to the nozzle 106 as indicated by the arrow (2).
The supplied processing liquid is injected from the processing liquid injection hole 109 to the lower part of the cylinder barrel 110 as indicated by an arrow (3), and ascends while contacting the inner surface of the cylinder barrel 110 as indicated by an arrow (4).
The processing liquid in the cylinder barrel 110 is discharged mainly from the first drainage passage 111 provided in the pallet 104 as indicated by an arrow (5), and the remaining portion of the processing liquid is covered by a lid as indicated by an arrow (6). The liquid is discharged from the second drainage passage 112 provided in the body 107.

  By the way, in a production line, a cylinder barrel having various diameters may be pretreated in one line. In order to preprocess cylinder barrels having different diameters, the upper opening of the cylinder barrel is sealed with a seal ring corresponding to the diameter of each cylinder barrel.

A cover member 107 having a large-diameter seal ring 102 is prepared for a large-diameter cylinder barrel, and a cover member 107 having a small-diameter seal ring 102 is prepared for a small-diameter cylinder barrel.
Thus, conventionally, there has been a concern of preparing a large number of cover members 107 corresponding to the diameter of the cylinder barrel.
This increases the procurement cost and storage cost of the cover member 107. In addition, the number of man-hours for changing the cover member 107 increases.
Improvements are required from recent cost reduction requirements.

JP 2008-214730 A

  An object of the present invention is to provide a surface treatment apparatus for a cylinder barrel capable of reducing the cost.

  In the invention according to claim 1, a cover member is placed on the gasket surface of the cylinder block of the internal combustion engine placed with the gasket surface facing upward to close the upper opening of the cylinder barrel, and into the cylinder barrel. In the cylinder barrel surface treatment apparatus for supplying the treatment liquid to treat the inner surface of the cylinder barrel, the cover member has flexibility on the lower surface and tightly contacts the gasket surface to prevent leakage of the treatment liquid. A plurality of seal rings for prevention are provided concentrically with the center of the cylinder barrel as the center, and these seal rings have a lower end level higher than the seal ring on the most central side. It is characterized by being attached with a height difference.

  The invention according to claim 2 is characterized in that the lower surface of the cover member has a stepped shape so that the protrusion margins from the lower surfaces of the plurality of seal rings are the same or substantially the same.

In the invention according to claim 1, the cover member is provided with a plurality of seal rings on the lower surface in a concentric shape centering on the center of the cylinder barrel, and these seal rings have the bottom end level at the centermost seal. It is attached with a height difference so that the seal ring farther from the center with respect to the ring becomes higher.
Of the plurality of seal rings, the most central seal ring is applied to the gasket surface of the small-diameter cylinder barrel. In a larger diameter cylinder barrel, the adjacent seal ring is brought into contact with the gasket surface. In the case of a cylinder barrel having a larger diameter, the adjacent seal ring is brought into contact with the gasket surface.
Thus, according to the diameter of a cylinder barrel, a sealing performance is exhibited with a suitable seal ring.
Since it is not necessary to change the seal ring and the cover member even for cylinder barrels having different diameters, it is possible to reduce the number of changeover steps.
In addition, since the cover member is shared, the cost of the entire apparatus can be reduced by reducing the number of parts.

  The invention according to claim 2 is characterized in that the lower surface of the cover member has a stepped shape so that the protrusion margins from the lower surfaces of the plurality of seal rings are the same or substantially the same. The protrusion allowance corresponds to the crushing allowance, and this crushing allowance affects the seal performance. If the protrusion margin varies, there is a possibility that the sealing performance may vary, and the shape design of the seal ring becomes difficult. In this regard, according to the present invention, since the protrusion margins are the same or substantially the same, the shape design of the seal ring is facilitated, and the procurement cost of the seal ring can be reduced.

It is a side view of the surface treatment apparatus of the cylinder barrel which concerns on this invention. It is sectional drawing of a surface treatment part. It is explanatory drawing of the state which seals the upper opening of the cylinder barrel of a different magnitude | size. It is explanatory drawing of the state which seals two cylinder barrels of a different magnitude | size simultaneously. It is sectional drawing of a staircase part. FIG. 6 is an enlarged view of 6 parts in FIG. 5. It is explanatory drawing of another embodiment of FIG. It is explanatory drawing of another embodiment of FIG. FIG. 9 is a sectional view taken along line 9-9 in FIG. 1. It is an effect | action figure of the surface treatment apparatus of the cylinder barrel concerning this invention. It is a figure explaining the pretreatment process of plating. It is a figure explaining the basic principle of the prior art.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, a cylinder barrel surface treatment apparatus 10 is provided at a base 12 having an adjuster 11, a lower column 13 rising from the base 12, and an upper end of the lower column 13. Provided on the pan 15 are a middle support member 14, a pan 15 that is supported by the middle support member 14 and collects the processing liquid, a processing liquid discharge pipe 16 that discharges the processing liquid collected in the pan 15, and the pan 15. The surrounding member 17, the surface treatment unit 20 provided in the middle support member 14 so as to be surrounded by the enclosure member 17, and drainage from the upper part of the surface treatment unit 20 provided in the surface treatment unit 20. A drainage pipe 21 to be guided, a processing liquid detection unit 22 for monitoring the drainage of the drainage pipe 21, a middle column 23 raised from the middle support member 14, and an upper end of the middle column 23 are provided. Have Comprises an upper support member 24, the upper column 25 has been raised from the upper support member 24, a top plate 26 provided at the upper end of the upper column 25.

  The surface treatment unit 20, which will be described in detail later, includes a pallet 31 that supports the cylinder block 27 on which the surface treatment is performed, a cover member 32 that covers the top of the cylinder block 27, and one of the treatment liquids provided on the cover member 32. And a second drainage passage 33 for discharging the part.

  Further, the surface treatment device 10 on the inner surface of the cylinder barrel is swingable about a rotary shaft 36 at the lower end of the lifting rod 34 and the lifting cylinder 35 that is provided on the top plate 26 and lifts the cover member 32 via the lifting rod 34. And an oscillating cylinder 41 that is provided below the elevating rod 34 and that oscillates the oscillating portion 37 via an advancing / retracting rod 38.

Next, the surface treatment unit 20 will be described.
As shown in FIG. 2, the surface treatment unit 20 as a main part of the cylinder barrel surface treatment apparatus 10 supports the cylinder block 27 so that the gasket surface 42 of the cylinder block 27 faces upward and also supports the cylinder barrel 43. A pallet 31 that closes the lower opening 44 of the cylinder, a first drainage passage 45 that is provided on the pallet 31 and discharges a part of the processing liquid stored in the cylinder barrel 43, and a cylinder block 27 A gasket surface having a step seal member 47 for sealing the step 46, a positioning pin 51 for positioning the hole 48 of the cylinder block 27 provided on the pallet 31, and a recess 53 connected to the upper opening 52 of the cylinder barrel 43 A cover member 32 that is placed on 42 and covers the upper opening 52 of the cylinder barrel 43; Flexible first to third seal rings 54, 55, 56 provided on the surface 59 for sealing the gasket surface 42, and attached to the cover member 32 so as to be inserted downward into the cover member 32. The nozzle 61 has a processing liquid injection hole 58 for injecting the processing liquid toward the wall 57 of the recess 53, and supplies the processing liquid to the inner surface of the cylinder barrel 43 through the wall 57 of the recess 53. A treatment liquid supply path 62 for supplying the treatment liquid and a second drainage passage 33 that is provided in the cover member 32 and discharges the remaining portion of the treatment liquid stored in the cylinder barrel 43.

Next, a state where the gasket surfaces 42 of cylinder blocks having different sizes are sealed will be described.
As shown in FIG. 3A, the cylinder block 27 including the cylinder barrel 43 having a small inner diameter is arranged so that the gasket surface 42 is on the upper side. The cover member 32 has a first seal ring 54, a second seal ring 55, and a third seal ring 56 that have flexibility on the lower surface 59 and are in close contact with the gasket surface 42 to prevent leakage of the processing liquid. The first to third seal rings 54, 55, 56 are arranged at a lower end level from the center 63 with respect to the seal ring on the most central side. It is attached with a difference in height so that the distant seal ring is higher. The lower surface 59 of the cover member 32 includes a stepped staircase portion 64 so that the protrusion margins from the lower surface 59 of the seal rings 54, 55, 56 are the same or substantially the same.
Only the first seal ring 54 provided on the highest staircase portion 64 contacts and seals the gasket surface 42. The second and third seal rings 54 do not contact the gasket surface 42.

FIG. 3B is a diagram for explaining a state in which the gasket surface 66 of the cylinder block 65 including the cylinder barrel 67 having a large diameter is sealed, and portions configured in the same manner as in FIG. The detailed description will be omitted.
Only the third seal ring 56 provided at the lowest stepped portion 64 contacts and seals the gasket surface 66. The diameters of the first and second seal rings 54 and 55 are smaller than the inner diameter of the cylinder barrel 67. Therefore, the first and second seal rings 54 and 55 are inside the inner surface of the cylinder barrel 67 and do not contact the cylinder barrel 67.

Since different cylinder blocks 27 and 65 can be sealed by the same cover member 32 and seal rings 53, 54 and 55, even when pre-processing is performed on different types of cylinder blocks in the production line, the cover member 32 is used. Therefore, the number of steps can be reduced, and man-hours can be reduced.
In the case of a cylinder barrel having an inner diameter that is intermediate between the inner diameter of the cylinder barrel 43 and the inner diameter of the cylinder barrel 67, the second seal ring 55 is in contact with the gasket surface for sealing, and the first and third The seal rings 54 and 56 do not contact the cylinder block.
Thus, according to the diameter of a cylinder barrel, a sealing performance is exhibited with a suitable seal ring.

Next, a state where the cylinder blocks 27 and 65 having different sizes are simultaneously sealed will be described.
As shown in FIG. 4, a first pallet 31 and a second pallet 69 as child pallets are provided on the parent pallet 68. The small cylinder block 27 is placed on the first pallet 31, and the large cylinder block 65 is placed on the second pallet 69.

A height L1 from the upper surface of the parent pallet 68 to the gasket surface 42 of the cylinder block 27 is a height that contacts the first seal ring 54 of the cover member 32.
On the other hand, the height L2 from the upper surface of the parent pallet 68 to the gasket surface 66 of the cylinder block 65 is a height that contacts the third seal ring 56 of the cover member 32.
Different cylinder blocks 27 and 65 can be sealed simultaneously with the two cover members 32 having the same height.
Further, since the cover member 32 and the nozzle 61 are the same, there is no need to change the cover member 32, and the number of man-hours can be reduced.
Further, the flow rate of the discharged processing liquid is adjusted by changing the diameters of the first drainage passages 45 and 71.

Next, the staircase portion 64 will be described.
In the comparative example of FIG. 5A, the stepped portion is not provided on the lower surface 73 of the cover member 72, and is flat. The first, second, and third seal rings 74, 75, 76 are all in contact with the gasket surface 66. The third seal ring 76 is liable to be damaged or deformed by contacting the edge of the hole 48.

Further, when sealing the small cylinder block 27, all of the first to third seal rings 74, 75, and 76 are in contact with the gasket surface 66, but when sealing the large cylinder block (FIG. 3, reference numeral 65). In this case, since only the third seal ring 76 contacts the gasket surface 66, a difference occurs in the pressure of the seal.
In order to equalize the pressure of the seal, the seal when all of the first to third seal rings 74, 75, and 76 are in contact as compared with the seal clamping force when only the third seal ring 76 is in contact. It is necessary to increase the clamping force. In order to increase the clamping force, it is necessary to increase the size of the lifting cylinder (FIG. 1, reference numeral 35), which increases the cost of the apparatus.

On the other hand, in the embodiment of FIG. 5B, the first seal ring 54 is in contact with the gasket surface 42, but the second and third seal rings 55 and 56 are not in contact with the gasket surface. The third seal rings 55 and 56 are not damaged.
Further, even if the cylinder blocks have different sizes, only one of the first to third seal rings 54, 55, and 56 is in contact with each other, so that the seal pressure can be made uniform.
Since it is not necessary to excessively increase the clamping force for sealing, it is possible to cope with the small lifting cylinder 35 and to reduce the cost of the apparatus.

Next, the cross-sectional shape of the seal rings 54, 55, and 56 will be described.
As shown in FIG. 6, a slope 77 is provided at the tip of the first to third seal rings 54, 55, 56. As a result, the treatment liquid is easily cut off, and the first to third seal rings 54, 55, and 56 are not adhered to the gasket surface 42.

  Moreover, the protrusion margin from the lower surface 59 of the 1st-3rd seal rings 54, 55, and 56 is the same or substantially the same, and the level | step difference L = 1mm. Thereby, the crush margin of the flexible seal rings 54, 55, and 56 can be secured. By reducing the level difference, it is possible to reduce the influence on the preprocessing due to the air accumulation at the corner (FIG. 3B, reference numeral 78), and to appropriately perform the preprocessing.

  The step is not limited to L = 1 mm, and may be L = 1.1 mm and L = 1.2 mm, and only one seal ring out of the plurality of seal rings 54, 55, 56 contacts the gasket surface, If the crushing allowance of the seal rings 54, 55, and 56 can be secured and there is no influence of air accumulation, the value of L may be different.

Next, another embodiment of FIG. 6 will be described.
As shown in FIG. 7, the lower surface 59 of the cover member 32 is a plane. The cover member 32 has a first seal ring 81, a second seal ring 82, and a third seal ring 83 that have flexibility on the lower surface 59 and are in close contact with the gasket surface 42 to prevent leakage of the processing liquid. The first to third seal rings 81, 82, 83 have a lower end level from the center 63 with respect to the most central seal ring. It is attached with a difference in height so that the distant seal ring is higher. This height difference (step) L = 1 mm.

  The step is not limited to L = 1 mm, and may be L = 1.1 mm and L = 1.2 mm, and only one of the plurality of seal rings 81, 82, 83 is in contact with the gasket surface, If the crushing allowance of the seal rings 81, 82, 83 can be secured and there is no influence of air accumulation, the value of L may be different.

Next, another embodiment of FIG. 4 will be described.
In FIG. 8, the same components as those in FIG. 4 are denoted by the same reference numerals, and detailed description thereof is omitted.
A small-diameter nozzle 61 is disposed on the small-diameter cylinder barrel 43 side.
A large diameter nozzle 84 is disposed on the large diameter cylinder barrel 67 side. Even in the case of the large cylinder block 65, the volume of the space formed by the inner surface of the cylinder barrel 67 and the outer surface of the nozzle 84 is reduced, and the time for filling with the processing liquid is shortened. it can.

Next, a state where cylinder blocks 27 and 65 having different sizes are arranged will be described.
As shown in FIG. 9, a parent pallet 68 is provided on the frame body 85, and the first pallet 31 and the second pallet 69 are arranged on the parent pallet 68. Since the combination of the first pallet 31 and the second pallet 69 can be freely changed, not only the same type of cylinder block but also different types of cylinder blocks can be preprocessed simultaneously.

The operation of the cylinder barrel surface treatment apparatus 10 described above will be described with reference to FIG.
In FIG. 10, the cover members 32 and 32 are moved as shown by the arrow (7), and the gasket surfaces 42 and 66 are sealed.

  The processing liquid is supplied from the nozzles 61 and 84 to the inner surfaces of the cylinder barrels 43 and 67 as indicated by the arrow (8). A part of the processing liquid stored in the cylinder barrels 43 and 67 is discharged from the first drainage passages 45 and 71 as indicated by arrows (9) and (9). The supply amount of the processing liquid is larger than the amount discharged from the first drainage passages 45 and 71. Therefore, the processing liquid ascends in the cylinder barrels 43 and 67 as indicated by an arrow (10). The remainder of the processing liquid stored in the cylinder barrels 43 and 67 is discharged from the second drainage passages 33 and 33 as indicated by an arrow (11).

  Note that the cylinder barrel surface treatment apparatus according to the present invention is applied with three steps in the embodiment, but the invention is not limited to three steps, and the cylinder barrel gasket surface is sealed, such as two steps, four steps, etc. If possible, it is possible to apply a plurality of stepped portions depending on the type of cylinder barrel.

  The cylinder barrel surface treatment apparatus of the present invention is suitable for pretreatment of plating on the cylinder barrel inner surface.

  DESCRIPTION OF SYMBOLS 10 ... Surface treatment apparatus of cylinder barrel, 20 ... Surface treatment part, 27, 65 ... Cylinder block, 31 ... 1st pallet, 32 ... Cover member, 33 ... 2nd drainage passage, 42, 66 ... Gasket surface, 43, 67 ... cylinder barrel, 52 ... upper opening, 54, 81 ... first seal ring, 55, 82 ... second seal ring, 56, 83 ... third seal ring, 59 ... lower surface, 63 ... cylinder barrel 64 ... staircase, 68 ... parent pallet, 69 ... second pallet.

Claims (2)

A cover member is placed on the gasket surface of the cylinder block of the internal combustion engine placed with the gasket surface facing upward to close the upper opening of the cylinder barrel, and the processing liquid is supplied into the cylinder barrel to supply the cylinder In the cylinder barrel surface treatment apparatus for treating the inner surface of the barrel,
The cover member is provided with a plurality of seal rings on the lower surface that are flexible and in close contact with the gasket surface to prevent leakage of the processing liquid in a concentric shape centered on the center of the cylinder barrel,
These seal rings are mounted with a difference in height so that the level of the lower end is higher with respect to the seal ring farthest from the center than the seal ring on the most central side. Surface treatment equipment.   The cylinder barrel surface treatment according to claim 1, wherein the lower surface of the cover member has a stepped shape so that protrusions from the lower surfaces of the plurality of seal rings are the same or substantially the same. apparatus.

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